/* function to toggle image */
function toggleImage(imgObjekt,status){
	imagepath = "img/";
	name = imgObjekt.name;
	if (status==1){
		imageName = imagepath + name + "_a.gif";
	}else{
		imageName = imagepath + name + ".gif";
	}
	theImage = new Image(); 
	theImage.src = imageName;
	document.images[name].src = theImage.src;
}
function unsetFormField(formFieldObject,predefinedValue){
	if(formFieldObject.value == predefinedValue){
		formFieldObject.value=''
	}
}


function showSubmenu(object){
	//object.getElementsByTagName('ul')[0].style.visibility='visible';
	object.getElementsByTagName('ul')[0].style.display='block';
}
function hideSubmenu(object){
	//object.getElementsByTagName('ul')[0].style.visibility='hidden';
	object.getElementsByTagName('ul')[0].style.display='none';
}